Self-healing Parallel Power Capacitor
✅Self-healing,long lifespan
✅Low loss,tanδ < 0.001
✅Compact design,light weight
✅Dry-type,no leakage
✅Dielectric is epoxy resin,eco-friendly
✅Safety,built-in pressure release，no explosion
- Product Introduction
Self-healing parallel power capacitor is a type of capacitor designed to automatically repair minor dielectric breakdowns that occur during operation, thereby extending its lifespan and maintaining performance. These capacitors are commonly used in low-voltage(below 1kV,AC 50/60Hz) electric power system,such as consumer electronics, power supplies, motor run/start circuits, and signal filtering.
● Our capacitor use Metallized Polypropylene film as dielectric,excellent self-healing perfomance,low loss(Low loss,tanδ < 0.001),
● Impregnate material is epoxy resin,dry-type no leakage,no pollution
● Built-in Pressure Disconnector,make it verysafety,no explosion risk
● Core material is Metallized Polypropylene film and epoxy,Space-saving and light weight,weight is 1/4 of traditional capacitors
● Maintainance free
Product Model
B:parallel capacitor
S:Impregnant(S is Microcrystalline Wax;Z is Vegetable Oil;K is epoxy resin)
MJ:Dielectric code(Metallized Polypropylene film)
Rated voltage
Rated capacity
No of phase:3 is three phase,1 is single phase
Key Features
● Self-Healing Mechanism:
When a localized breakdown occurs due to overvoltage or dielectric weakness, the capacitor "self-heals" by vaporizing the defective area, isolating the fault, and restoring functionality.This prevents catastrophic failure and improves reliability.
● Low-Voltage Range:
Typically rated for 50V to 1,000V, with common low-voltage variants in the 5V to 250V range.
Used in DC or AC applications where voltage spikes may occur.
● Dielectric Materials:
Metallized Film (Polypropylene):
Polypropylene (PP) offers low losses and high stability.
Product Specifications
| Parameter | Typical Range |
|---|---|
| Capacitance | 0.1 µF – 100 µF |
| Voltage Rating | 16V – 450V DC/AC |
| Ripple Current | 1A – 20A (depends on size) |
| ESR (Equivalent Series Resistance) | <0.1Ω (low for MKP) |
| Dissipation Factor (tan δ) | 0.0005–0.01 |
| Operating Temperature | -40°C to +105°C (PP) |
| Max overvoltage | 1.1Un |
| Max overcurrent | 1.3In |
| Self discharge | The capacitor's voltage drops to below 50V within 3 minutes after power disconnection. |
| Standard | GB/T12747,IEC60831 |
Note.End-of-Life Criteria:Capacitance drop >20% from initial.Dissipation factor increase >200%.Contact us for more details
Comparison: Self-Healing vs. Traditional Oil-Immersed Capacitors
| Property | Self-Healing Power Capacitor | Traditional Oil-Immersed Capacitor |
|---|---|---|
| Safety | Extremely High, self-healing feature prevents explosion | Low, prone to bulging, oil leakage, and explosion |
| Dielectric & Electrodes | Metallized polypropylene film | Capacitor paper, aluminum foil |
| Filling Material | Inert gas, environmentally friendly resin, or dry-type | Mineral oil, silicone oil |
| Environmental Impact | Excellent, pollution-free, biodegradable | Poor, oil medium may cause environmental pollution |
| Size & Weight | Small, Light (high power density) | Large, Heavy |
| Power Loss | Very Low (tanδ < 0.001) | Relatively High (tanδ ≈ 0.003) |
| Lifespan | Long | Relatively Short |
| Maintenance | Basically maintenance-free | Requires regular inspection |
Process Quality Control
Production process of Dry Power factor correction capacitor:
Receiving materials - Incoming material inspection - Warehousing - Material issuance - Slitting - Winding - Metal spraying - Peeling - Energizing- heat shaping - Assembly - testing - Vacuuming - Medium filling - sealing - finished product testing -FQC- Packaging - Warehousing
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